Methods and devices for coding and decoding the position of the last significant coefficient
US8446301B2 · kind B2 · utility
23Cited by
11References
31Claims
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Key dates
| Filing date | Apr 15, 2011 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Aug 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/3075
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and devices are described for entropy coding data using an entropy coder to encode quantized transform domain coefficient data. Last significant coefficient information is signaled in the bitstream using two-dimensional coordinates for the last significant coefficient. The context for bins of one of the coordinates is based, in part, upon the value of the other of the coordinates. In one case, instead of signaling last significant coefficient information, the number of non-zero coefficients is binarized and entropy encoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.